/**
 * if a string has a paragraph as its outermost element, remove it (e.g. `<p><code>hello</code></p>` -> `<code>hello</code>`)
 * in AST form it looks like:
 * {
 *  type: 'root',
 *  children: [
 *  {
 *    type: 'paragraph',
 *    children: [
 *      {
 *        type: 'mdxJsxTextElement',
 *        name: 'p',
 *        children: [<the content>]
 *      }
 *     ]
 *   }]
 * }
 * @param content mdx string
 * @returns mdx string without outer paragraph
 */
export declare const removeOuterParagraph: (content: string) => string;
